plenum chamber[′plen·əm ‚chām·bər]
An enclosed space in which a plenum condition exists; air is forced into it for slow distribution through ducts.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
An air compartment maintained at a pressure slightly above atmospheric, to deliver and distribute the air to one or more ducts or outlets.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
In an air-conditioning system, an enclosed volume which (in a supply system) is at a slightly higher pressure than the atmosphere and is connected to a number of branch supply ducts, or which (in a return system) is at a slightly lower pressure than the atmosphere and is connected to a number of return grilles; a plenum, 1.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved